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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright(c) 2007 Intel Corporation. All rights reserved.4 *5 * Maintained at www.Open-FCoE.org6 */7 8#ifndef _FC_FCOE_H_9#define	_FC_FCOE_H_10 11/*12 * FCoE - Fibre Channel over Ethernet.13 * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf)14 */15 16/*17 * Default FC_FCOE_OUI / FC-MAP value.18 */19#define	FC_FCOE_OUI	0x0efc00	/* upper 24 bits of FCOE MAC */20 21/*22 * Fabric Login (FLOGI) MAC for non-FIP use.  Non-FIP use is deprecated.23 */24#define	FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }25 26#define	FC_FCOE_VER	0			/* version */27 28/*29 * Ethernet Addresses based on FC S_ID and D_ID.30 * Generated by FC_FCOE_OUI | S_ID/D_ID31 */32#define	FC_FCOE_ENCAPS_ID(n)	(((u64) FC_FCOE_OUI << 24) | (n))33#define	FC_FCOE_DECAPS_ID(n)	((n) >> 24)34 35/*36 * FCoE frame header - 14 bytes37 * This follows the VLAN header, which includes the ethertype.38 */39struct fcoe_hdr {40	__u8		fcoe_ver;	/* version field - upper 4 bits */41	__u8		fcoe_resvd[12];	/* reserved - send zero and ignore */42	__u8		fcoe_sof;	/* start of frame per RFC 3643 */43};44 45#define FC_FCOE_DECAPS_VER(hp)	    ((hp)->fcoe_ver >> 4)46#define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)47 48/*49 * FCoE CRC & EOF - 8 bytes.50 */51struct fcoe_crc_eof {52	__le32		fcoe_crc32;	/* CRC for FC packet */53	__u8		fcoe_eof;	/* EOF from RFC 3643 */54	__u8		fcoe_resvd[3];	/* reserved - send zero and ignore */55} __attribute__((packed));56 57/*58 * Minimum FCoE + FC header length59 * 14 bytes FCoE header + 24 byte FC header = 38 bytes60 */61#define FCOE_HEADER_LEN 3862 63/*64 * Minimum FCoE frame size65 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes66 */67#define FCOE_MIN_FRAME 4668 69/*70 * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10.71 */72struct fcoe_fc_els_lesb {73	__be32		lesb_link_fail;	/* link failure count */74	__be32		lesb_vlink_fail; /* virtual link failure count */75	__be32		lesb_miss_fka;	/* missing FIP keep-alive count */76	__be32		lesb_symb_err;	/* symbol error during carrier count */77	__be32		lesb_err_block;	/* errored block count */78	__be32		lesb_fcs_error; /* frame check sequence error count */79};80 81/*82 * fc_fcoe_set_mac - Store OUI + DID into MAC address field.83 * @mac: mac address to be set84 * @did: fc dest id to use85 */86static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)87{88	mac[0] = (u8) (FC_FCOE_OUI >> 16);89	mac[1] = (u8) (FC_FCOE_OUI >> 8);90	mac[2] = (u8) FC_FCOE_OUI;91	mac[3] = did[0];92	mac[4] = did[1];93	mac[5] = did[2];94}95 96#endif /* _FC_FCOE_H_ */97